VfxPhysicsPositionModifier

Inheritance 1 ancestor · 14 siblings

VfxPhysicsModifierBase

Class Documentation

A physics modifier that offsets the particles' position. It places them at spawn and can move them by an animated offset afterwards.

Spawn. The birth offset is InitialLocalOffset, plus InitialWorldOffset, plus a point sampled from EmissionSource. It is added to the particle's position.
Each step, before the integration. LocalKeyedOffset and WorldKeyedOffset are evaluated, and the particle is moved by how much each value changed since the previous step. The particle therefore sits at the keyed offset from where its other motion takes it. On the first step the full value is applied.

All offsets are in world units. The movement is a displacement, so it gives the particle no momentum.

Properties

0x1fd12444

Flag = false

Removed in 15.24

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EmissionSource

Pointer<IVfxEmissionSource> = null

16.1

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A shape that each particle's birth point is sampled from, such as a sphere, a box, a mesh or the bound unit's body. The sampled point is added to the birth offset. The shape also gives each particle an emission normal, which VfxPhysicsVelocityModifier uses as the radial direction. See IVfxEmissionSource.

InitialLocalOffset

Embed<VfxVector3DynamicProperty> = { "Vector3": {} }

16.1

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Birth offset in the axes of the particle's reference frame, evaluated once per particle at spawn.

InitialWorldOffset

Embed<VfxVector3DynamicProperty> = { "Vector3": {} }

16.1

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Birth offset that keeps its world direction, evaluated once per particle at spawn.

LocalKeyedOffset

Embed<VfxVector3DynamicProperty> = { "Vector3": null }

16.20

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Animated offset in the axes of the particle's reference frame, evaluated on every step. Only its change between steps moves the particle. Left unset, there is no keyed offset.

WorldKeyedOffset

Embed<VfxVector3DynamicProperty> = { "Vector3": null }

16.20

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Animated offset that keeps its world direction, evaluated on every step. Only its change between steps moves the particle. Left unset, there is no keyed offset.